Tsz Wo Nicholas Sze created HDFS-7843:
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Summary: A truncated file is corrupted after rollback from a
rolling upgrade
Key: HDFS-7843
URL: https://issues.apache.org/jira/browse/HDFS-7843
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Tsz Wo Nicholas Sze
Assignee: Tsz Wo Nicholas Sze
Priority: Blocker
Here is a rolling upgrade truncate test from [~brandonli]. The basic test step
is: (3 nodes cluster with HA)
1. upload a file to hdfs
2. start rollingupgrade. finish rollingupgrade for namenode and one datanode.
3. truncate the file in hdfs to 1byte
4. do rollback
5. download file from hdfs, check file size to be original size
I see the file size in hdfs is correct but can't read it because the block is
corrupted.
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